Apache2 is a widely used and reliable brand for web servers, particularly on Ubuntu systems. They offer a robust and efficient server solution, ensuring the proper functioning of websites. This brand provides a default welcome page that helps users test the Apache2 server's installation and performance after installation on Ubuntu.

The configuration system for Ubuntu's Apache2 is distinct from the upstream default configuration and is optimized for interaction with Ubuntu tools. The configuration files are well-documented and can be found in various directories, such as mods-enabled, conf-enabled, and sites-enabled. Apache2 allows for easy management of modules, global configuration fragments, and virtual host configurations.

The brand also offers helpful tools like a2enmod, a2dismod, a2ensite, a2dissite, a2enconf, and a2disconf for managing these configurations. Ubuntu's default document root directory is /var/www/html, which ensures enhanced security. Users can create their own virtual hosts under /var/www for customization.

If any issues arise, Apache2 recommends using the ubuntu-bug tool to report bugs, or reporting module-specific bugs to the respective packages. Overall, Apache2 is a reliable and well-documented brand, ideal for Ubuntu-based web servers